55777

Potassium disulfite

analytical standard

• Synonym(s): E224, Potassium metabisulfite, Potassium pyrosulfite
• Linear Formula: K₂S₂O₅
• CAS Number: 16731-55-8
• Molecular Weight: 222.32
• EC Number: 240-795-3
• MDL number: MFCD00167605
• UNSPSC Code: 85151701
• PubChem Substance ID: 329758155
• NACRES: NA.24

Properties

• grade: analytical standard
• Quality Level: 100
• Assay: ≥98% (RT)
• shelf life: limited shelf life, expiry date on the label
• technique(s): HPLC: suitable; gas chromatography (GC): suitable
• solubility: H₂O: 200 mg/mL, clear to very slightly hazy, colorless
• application(s): cleaning products; cosmetics; food and beverages; personal care
• format: neat
• SMILES string: [K+].[K+].[O-]S(=O)S([O-])(=O)=O
• InChI: 1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
• InChI key: RWPGFSMJFRPDDP-UHFFFAOYSA-L

Description

General description

Potassium disulfite (Potassium metabisulfite, PMB) is an inorganic salt with antimicrobial properties. It is a sulfiting agent that prevents browning of foods.

Application

Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.

Safety Information

• Pictograms: GHS05
• Signal Word: Danger
• Hazard Statements: H318
• Precautionary Statements: P280 - P305 + P351 + P338
• Hazard Classifications: Eye Dam. 1
• Supplementary Hazards: EUH031
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1